LT1001C LINER [Linear Technology], LT1001C Datasheet - Page 7

• Manufacturer Part Number: LT1001C
• Description: Precision Operational Amplifier
• Manufacturer: LINER [Linear Technology]

Offset Voltage Adjustment
The input offset voltage of the LT1001, and its drift with tempera-
ture, are permanently trimmed at wafer test to a low level.
However, if further adjustment of Vos is necessary, nulling with
a 10k or 20k potentiometer will not degrade drift with tempera-
ture. Trimming to a value other than zero creates a drift of (Vos/
300) V/ C, e.g., if Vos is adjusted to 300 V, the change in drift
will be 1 V/ C. The adjustment range with a 10k or 20k pot is
approximately 2.5mV. If less adjustment range is needed, the
sensitivity and resolution of the nulling can be improved by using
a smaller pot in conjunction with fixed resistors. The example
below has an approximate null range of 100 V.
INPUT
TANTALUM
Improved Sensitivity Adjustment
2.2 F
R
1k
INPUT
IN
+
15pF
10k
2
3
–
+
1
LT1001
TUSONIX # 519-3188
7.5k
7.5k
–15V
1k
3
2
8
4
+
–
15-60pF
LT1001
7
1k
R
2N5486
f
6
1k
+15V
–15V
6
OUTPUT
1001 F02
0.01 F
0.01 F
1N914
1N914
3.9k
3.9k
30k
30k
1000v/ sec Op Amp
DC Stabilized
.001
F
FULL POWER
BANDWIDTH 8MHz
300
300
10
2N5160
2N3866
1.8k
470
200 *
200 *
The device under test should be warmed up for three minutes and
shielded from air currents.
33
22
–
+
LT1001
DEVICE
UNDER
TEST
(Peak-to-Peak noise measured in 10 sec interval)
100k
0.1 F
200pF
200pf
2N3904
390
0.1Hz to 10Hz Noise Test Circuit
2N5160
2N3866
4.7 F
1.2k
2k
*ADJUST FOR
BEST SQUARE WAVE
AT OUTPUT
2N3906
2N3904
24.3k
–
+
LT1001
2N4440
2N4440
.5
.5
22 F TANTALUM
100k
0.1 F
–
+
0.1 F
VOLTAGE GAIN = 50,000
.1 F
22 F TANTALUM
–15V
+
2.2 F
4.3k
LT1001
+15V
1001 F04
OUTPUT
22 F
R
110k
IN
SCOPE
= 1M
7
1001 F03
1